Not bad! I liked the audio and the mechanics were pretty fun, but there is a couple thing that dragged it down a bit.
1) Camera glitch. Someone else already mentioned this, but making certain inputs during a transition causes the camera to not go fully into the other room. By spamming buttons a bit, I was able to get it completely stuck in between 4 rooms.
2) Lack of variation. Keeping the same two enemies and one weapon made the game start to feel repetitive and boring after a while. A couple more enemies, or traps, or weapons, or really just anything to spice it up would've been nice.
3) The tile set art. While the character and the enemy looked pretty good, the tile set used for the walls doesn't really match. On top of that, the floor is all just a solid color. At the beginning of the game, I couldn't tell the walls were walls so I thought it would be a wave based thing so I waiting for like 15 seconds for something to happen in the starting room.
4) I didn't really get the use of the theme. While I know that you are the sword "guiding" the player, it doesn't change the game at all. The game would be the same without the theme.
Overall though, I enjoyed the game.
(Also if you could play, rate, and give feedback to my game that would be much appreciated)